[Zyzzthetic]

Got an m240i and I cut both the resonators and my car sounds much better than stock. The car is still under warranty so I don't want to change the exhaust system. What else can I do to the stock system to improve sound?

[Liandri]

Get a canflap controller so you have control of the factory exhaust valve, then weld a pipe directly from the premuffler pipe to the driver side tailpipe before the valve. When the valve is open it's a muffler bypass

[morphomeman]

Resonators affect the exhaust sound in a variety of ways and don't usually do much else. Can you pinpoint how you feel that deleting the resonators improved the sound in this particular case? Does it change at different engine speeds? Resonator deletion can result in a drone at certain speeds, which some find annoying, especially in the highway at a constant cruising speed.

[KennyFSU]

You can remove a fuse in the trunk and have the exhaust valve/flap stay open at all times.

[Throttlesteer14]

Honestly, if you're going to modify the stock exhaust......just do it. I seriously doubt you're ever going to have warranty concerns with adding an axle back system or even changing the tips. I just don't see a whole lot of benefit spending time cutting things or modifying the existing system.

[Zyzzthetic]

Thanks for the replies guys!

Deleting both resonators made the overall stock exhaust sound 20-30% louder and 50% more burbles and pops on discharge. Well worth the $200 CAD!

As for the exhaust flap mod, doesn't it affect start up? I read somewhere the reason for one of the tailpipes being closed was to moderate something on the tailpipes. Sorry don't remember much. Will it just sound like sport mode all the time? I have the bimmercode app and I have left the setting for the flap to be on all the time, but I don't think it works lol. At least no improvement to burbles and pops in Eco/Comfort!

Regarding getting a different exhaust, my dealers are anal lol. I've called both the dealers in my city and they both said it would disqualify my warranty, including powertrain, if I was to even delete the resonators... did it anyways.

Anyways going forward, do you guys recommend removing the muffler or should I do something else to the stock exhaust? Don't know too much about exhausts sorry

[jules_78th]

Drone? At what speed/RPM are you getting it?

[Throttlesteer14]

Originally Posted by Zyzzthetic

Regarding getting a different exhaust, my dealers are anal lol. I've called both the dealers in my city and they both said it would disqualify my warranty, including powertrain, if I was to even delete the resonators... did it anyways.

Anyways going forward, do you guys recommend removing the muffler or should I do something else to the stock exhaust? Don't know too much about exhausts sorry

Well you already deleted the resonators. So, I'm not sure what replacing the exhaust will do beyond that concern. I'm still struggling with the idea that dealers think replacing the exhaust will disqualify your warranty. Their parts shop probably has MPEs for sale that they install on site. Warranty claims are generally up to the manufacturer, not the dealership (although it helps to have the dealership in your camp). But, what would BMW do if you had an M Performance Exhaust in place and filed a warranty claim? Assuming the exhaust was deemed the culprit, would they void the warranty over a factory part? Highly unlikely

[BimBimM2]

Originally Posted by Zyzzthetic

Thanks for the replies guys!

Deleting both resonators made the overall stock exhaust sound 20-30% louder and 50% more burbles and pops on discharge. Well worth the $200 CAD!

As for the exhaust flap mod, doesn't it affect start up? I read somewhere the reason for one of the tailpipes being closed was to moderate something on the tailpipes. Sorry don't remember much. Will it just sound like sport mode all the time? I have the bimmercode app and I have left the setting for the flap to be on all the time, but I don't think it works lol. At least no improvement to burbles and pops in Eco/Comfort!

Regarding getting a different exhaust, my dealers are anal lol. I've called both the dealers in my city and they both said it would disqualify my warranty, including powertrain, if I was to even delete the resonators... did it anyways.

Anyways going forward, do you guys recommend removing the muffler or should I do something else to the stock exhaust? Don't know too much about exhausts sorry

Are you in the Twin Cities area? Both those dealers sound like the only two dealers in the Twins.

[Climate Changer]

Have you thought of a muffler delete?

[TonM3]

Originally Posted by Zyzzthetic

Thanks for the replies guys!

Deleting both resonators made the overall stock exhaust sound 20-30% louder and 50% more burbles and pops on discharge. Well worth the $200 CAD!

As for the exhaust flap mod, doesn't it affect start up? I read somewhere the reason for one of the tailpipes being closed was to moderate something on the tailpipes. Sorry don't remember much. Will it just sound like sport mode all the time? I have the bimmercode app and I have left the setting for the flap to be on all the time, but I don't think it works lol. At least no improvement to burbles and pops in Eco/Comfort!

Regarding getting a different exhaust, my dealers are anal lol. I've called both the dealers in my city and they both said it would disqualify my warranty, including powertrain, if I was to even delete the resonators... did it anyways.

Anyways going forward, do you guys recommend removing the muffler or should I do something else to the stock exhaust? Don't know too much about exhausts sorry

Both the Dinan and MPerformance exhaust maintain your warranty

[Zyzzthetic]

Originally Posted by Climate Changer

Have you thought of a muffler delete?

Would it sound good with both the resonators deleted?

Also I'm from Calgary, Canada. We only have two dealers and they don't play ball.

[Zyzzthetic]

Originally Posted by TonM3

Both the Dinan and MPerformance exhaust maintain your warranty

Last I heard, Dinan and BMW had a break up?

[morphomeman]

The MPE exhaust is a BMW part, so it would not void the BMW warranty.
The deal with Dinan is complex but they have a special relation with BMW (or did?).
Apart from that, it is in the interest of BMW to find any excuse for voiding the warranty because of after-market parts or other general meddling.
Their warranty covers the car that they have manufactured, not one that has been modified.
So, no, OP, the dealers are not being difficult.
That said, I have never understood why one would mess with the exhaust system for the sole purpose of getting more noise out of it. If there were some gain in power, I could understand, but AFAIK the mods that you are proposing have no such consequences. All they result in is noise pollution.

[Zyzzthetic]

Originally Posted by morphomeman

The MPE exhaust is a BMW part, so it would not void the BMW warranty.
The deal with Dinan is complex but they have a special relation with BMW (or did?).
Apart from that, it is in the interest of BMW to find any excuse for voiding the warranty because of after-market parts or other general meddling.
Their warranty covers the car that they have manufactured, not one that has been modified.
So, no, OP, the dealers are not being difficult.
That said, I have never understood why one would mess with the exhaust system for the sole purpose of getting more noise out of it. If there were some gain in power, I could understand, but AFAIK the mods that you are proposing have no such consequences. All they result in is noise pollution.

I just want a little more sound from my daily sports car. In my opinion the car sounds too tame for an M Performance vehicle.

[The_otherM235i]

Be like me and delete the entire exhaust system. All jokes aside i'd just cut the mufflers off along with the resonator. That's more than loud enough for most people.

[Climate Changer]

Originally Posted by Zyzzthetic

Would it sound good with both the resonators deleted?

Also I'm from Calgary, Canada. We only have two dealers and they don't play ball.

Muffler delete is the sweet spot for me. Amplifies burbles. Would love to hear both muffler and resonator and cat.

[Zyzzthetic]

Originally Posted by The_otherM235i

Be like me and delete the entire exhaust system. All jokes aside i'd just cut the mufflers off along with the resonator. That's more than loud enough for most people.

Yes exactly, deleting the resonators left me 50% satisfied! I think adding a muffler delete would make me very happy!

[The_otherM235i]

Originally Posted by Zyzzthetic

Yes exactly, deleting the resonators left me 50% satisfied! I think adding a muffler delete would make me very happy!

Muffler delete with resonator delete is as loud as I would go for most people, going completely straight pipe is extremely obnoxious and very loud, now if you're 20 like me maybe you'll like it. If you're prefrontal cortex is developed more than mine you might just be happy with a muffler rez delete combo.

[keylime503]

Originally Posted by KennyFSU

You can remove a fuse in the trunk and have the exhaust valve/flap stay open at all times.

This is the first I'm hearing about removing a fuse to get the second exhaust pipe's flap to always be open. Link?

[The_otherM235i]

Originally Posted by keylime503

This is the first I'm hearing about removing a fuse to get the second exhaust pipe's flap to always be open. Link?

You can also put it in sport+, go behind the car and just disconnect the sensor plugged into the exhaust valve and tape it up somewhere out of the way. Fixed

[Zyzzthetic]

Originally Posted by The_otherM235i

You can also put it in sport+, go behind the car and just disconnect the sensor plugged into the exhaust valve and tape it up somewhere out of the way. Fixed

Would that make the car always loud like being sport/sport+?